package com.tangyuan.common.util;

import com.tangyuan.model.WechatTokenEntity;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.nio.charset.StandardCharsets;

public class WechatUtils {
    private final static Logger log = LoggerFactory.getLogger(WechatUtils.class);
    private final static String appid = "wx47aec30c65dd33fe"; //凭证
    private final static String appsecret = "1bcdf1e2d45c67fe9ab83071fb8443a0"; //凭证密钥

    // 凭证获取（GET）
    public final static String tokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
    //userinfo
    public final static String userInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";

    /**
     * 获取接口访问凭证
     *
     * @param code app授权后传回
     * @return
     */
    public static WechatTokenEntity getToken(String code) throws JSONException {
        WechatTokenEntity token = new WechatTokenEntity();
//        long now = new Date().getTime();
//        if (tokenTime != 0 && now - tokenTime < 7000000) {//token有效时间 7e6 毫秒
//            return token;
//        }
        String requestUrl = tokenUrl.replace("APPID", appid).replace("SECRET", appsecret).replace("CODE", code);
        // 发起GET请求获取凭证
        JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);
        if (null != jsonObject) {
            try {
                token.setUnionId(jsonObject.getString("unionid"));
                token.setOpenid(jsonObject.getString("openid"));
                token.setAccessToken(jsonObject.getString("access_token"));
                token.setRefreshToken(jsonObject.getString("refresh_token"));
                token.setExpiresIn(jsonObject.getInt("expires_in"));
            } catch (JSONException e) {
                token = null;
                // 获取token失败
                log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
            }
        }
        return token;
    }
    /**
     * 发送https请求
     *
     * @param requestUrl    请求地址
     * @param requestMethod 请求方式（GET、POST）
     * @param outputStr     提交的数据
     * @return JSONObject(通过JSONObject.get ( key)的方式获取json对象的属性值)
     */
    public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {
        JSONObject jsonObject = null;
        try {
            // 创建SSLContext对象，并使用我们指定的信任管理器初始化
            TrustManager[] tm = {new WechatTrustManager()};
            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // 从上述SSLContext对象中得到SSLSocketFactory对象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setSSLSocketFactory(ssf);

            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            // 设置请求方式（GET/POST）
            conn.setRequestMethod(requestMethod);

            // 当outputStr不为null时向输出流写数据
            if (null != outputStr) {
                OutputStream outputStream = conn.getOutputStream();
                // 注意编码格式
                outputStream.write(outputStr.getBytes(StandardCharsets.UTF_8));
                outputStream.close();
            }

            // 从输入流读取返回内容
            InputStream inputStream = conn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String str = null;
            StringBuilder stringBuilder = new StringBuilder();
            while ((str = bufferedReader.readLine()) != null) {
                stringBuilder.append(str);
            }

            // 释放资源
            bufferedReader.close();
            inputStreamReader.close();
            inputStream.close();
            inputStream = null;
            conn.disconnect();
            jsonObject = JSONObject.fromObject(stringBuilder.toString());
        } catch (ConnectException ce) {
            System.err.printf("连接超时：{}", ce);
        } catch (Exception e) {
            System.err.printf("https请求异常：{}", e);
        }
        return jsonObject;
    }


  /*  public static void main(String args[]) {
        // 获取接口访问凭证
        String accessToken = getToken("填入你的授权code").getAccessToken();
        String openid = getToken("填入你的授权code").getOpenid();

    }*/

}